diff options
Diffstat (limited to 'astro/query_simbad.py')
| -rwxr-xr-x | astro/query_simbad.py | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/astro/query_simbad.py b/astro/query_simbad.py new file mode 100755 index 0000000..4e7ccd7 --- /dev/null +++ b/astro/query_simbad.py @@ -0,0 +1,139 @@ +#!/usr/bin/env python3 +# -*- coding: utf-8 -*- +# +# NOTE: +# * SimbadClass +# https://astroquery.readthedocs.org/en/latest/api/astroquery.simbad.SimbadClass.html +# * All available VOTable fields: +# http://simbad.u-strasbg.fr/simbad/sim-help?Page=sim-fscript#VotableFields +# +# ChangeLog: +# 2016-01-14: +# * Add 'z_value' +# +# TODO: +# * allow to query by coordinates & radius range +# * filter queryed results according to the type/other... +# * if not queryed by name, then try query by coordinates +# + +""" +Query SIMBAD with the provided name or coordinate. +http://simbad.u-strasbg.fr/simbad/ +""" + +__version__ = "0.1.1" +__date__ = "2016-01-14" + + +import sys +import argparse +import csv + +from astroquery.simbad import Simbad +from astropy import coordinates +import astropy.units as u + + +## Simbad configurations +Simbad.ROW_LIMIT = 30 +Simbad.TIMEOUT = 20 + +## Add query items/fields +# otype: standard name of the object type +# rv_value: Radial velocity value. Eventually translated from a redshift +# z_value: Redshift value. Eventually translated from a radial velocity +# rvz_qual: Quality code (A: best, .., E: worst) +# rvz_type: stored type of velocity: 'v'=radial velocity, 'z'=redshift +Simbad.reset_votable_fields() +Simbad.add_votable_fields('otype', 'rv_value', 'z_value', 'rvz_qual', 'rvz_type') + + +def query_name(name, verbose=False): + """ + Query SIMBAD by name. + """ + q = Simbad.query_object(name) + try: + main_id = str(q['MAIN_ID'][0], encoding='utf-8') + otype = str(q['OTYPE'][0], encoding='utf-8') + rv = q['RV_VALUE'][0] + z = q['Z_VALUE'][0] + rvz_qual = q['RVZ_QUAL'][0] + rvz_type = q['RVZ_TYPE'][0] + if verbose: + print('%s: %s,%s,%s,%s,%s,%s' % (name, main_id, otype, rv, z, + rvz_qual, rvz_type)) + except (TypeError, KeyError) as e: + main_id = '' + otype = '' + rv = '' + z = '' + rvz_qual = '' + rvz_type = '' + if verbose: + print('*** %s: not found ***' % name, file=sys.stderr) + # + results = { + 'main_id': main_id, + 'otype': otype, + 'rv': rv, + 'z': z, + 'rvz_qual': rvz_qual, + 'rvz_type': rvz_type, + } + return results + + +def main(): + parser = argparse.ArgumentParser( + description="Query SIMBAD ...") + parser.add_argument("-V", "--version", action="version", + version="%(prog)s " + "%s (%s)" % (__version__, __date__)) + parser.add_argument("infile", + help="file contains list of names; one per line") + parser.add_argument("outfile", + help="output with queryed data, empty if not found; CSV format") + parser.add_argument("-v", "--verbose", dest="verbose", + action="store_true", help="show verbose information") + args = parser.parse_args() + + name_list = [] + main_id_list = [] + otype_list = [] + rv_list = [] + z_list = [] + rvz_qual_list = [] + rvz_type_list = [] + + with open(args.infile) as f: + for name in f: + name = str.strip(name) + name_list.append(name) + qr = query_name(name, verbose=args.verbose) + main_id_list.append(qr['main_id']) + otype_list.append(qr['otype']) + rv_list.append(qr['rv']) + z_list.append(qr['z']) + rvz_qual_list.append(qr['rvz_qual']) + rvz_type_list.append(qr['rvz_type']) + + with open(args.outfile, 'w') as of: + writer = csv.writer(of) + writer.writerow([ "Name", "SIMBAD_ID", "Type", + "RV", "z", "RV/z_Quality", "RV/z_Type" ]) + for i in range(len(name_list)): + writer.writerow([ name_list[i], + main_id_list[i], + otype_list[i], + rv_list[i], + z_list[i], + rvz_qual_list[i], + rvz_type_list[i] ]) + + +if __name__ == "__main__": + main() + + +# vim: set ts=4 sw=4 tw=0 fenc=utf-8 ft=python: # |